//package com.web.gatewayservice.filter;
//
//import com.alibaba.fastjson.JSON;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
//import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
//import org.springframework.cloud.gateway.support.NotFoundException;
//import org.springframework.core.annotation.Order;
//import org.springframework.core.io.buffer.DataBuffer;
//import org.springframework.http.HttpHeaders;
//import org.springframework.http.HttpStatus;
//import org.springframework.http.MediaType;
//import org.springframework.http.server.reactive.ServerHttpResponse;
//import org.springframework.stereotype.Component;
//import org.springframework.web.server.ResponseStatusException;
//import org.springframework.web.server.ServerWebExchange;
//import reactor.core.publisher.Mono;
//
///**
// * 网关统一异常处理
// */
//@Order(-1)
//@Component
//public class GatewayExceptionHandler implements ErrorWebExceptionHandler {
//    private static final Logger log = LoggerFactory.getLogger(GatewayExceptionHandler.class);
//
//    @Override
//    public Mono<Void> handle(ServerWebExchange exchange, Throwable ex){
//        ServerHttpResponse response = exchange.getResponse();
//        //首先检查响应是否已经提交（即是否已经发送给客户端）。如果已提交，则直接返回包含异常的Mono。
//        if (response.isCommitted()){
//            return Mono.error(ex);
//        }
//        String msg = "";
//        if (ex instanceof NotFoundException) {
//            msg = "服务器迷路啦，30秒后再重试一下. ";
//        }
//        else if (ex instanceof ResponseStatusException){
//            ResponseStatusException responseStatusException = (ResponseStatusException) ex;
//            msg = responseStatusException.getMessage();
//        }
//        else{
//            msg = "内部服务器异常，请联系管理员";
//        }
//
//        log.error("[网关异常处理]请求路径:{},异常信息:{}", exchange.getRequest().getPath(), ex.getMessage());
//
//        return write(response, MediaType.APPLICATION_JSON_VALUE, HttpStatus.OK, msg);
//    }
//
//    /**
//     * 响应
//     */
//    public static Mono<Void> write(ServerHttpResponse response, String contentType, HttpStatus status, Object value){
//        response.setStatusCode(status);
//        response.getHeaders().add(HttpHeaders.CONTENT_TYPE, contentType);
//        //通用的响应实体类，使用自己定义的通用返回类就行
//        DataBuffer dataBuffer = response.bufferFactory().wrap(JSON.toJSONString(value).getBytes());
//        return response.writeWith(Mono.just(dataBuffer));
//    }
//}
